Resistance to Dichelops melacanthus (Hemiptera: Pentatomidae) in soybean genotypes of different maturity groups

Vinícius Fernandes Canassa,André Luiz Lourenção,José Paulo Franco Bentivenha,Luiz Eduardo Da Rocha Pannuti,Edson Luiz Lopes Baldin

doi:10.1590/1678-4499.068

Vinícius Fernandes Canassa, André Luiz Lourenção + Show 3 more

Open Access

https://doi.org/10.1590/1678-4499.068

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Abstract

Some species of pentatomids stink bugs have global economic importance, damaging various plant species during the vegetative and reproductive phases. Dichelops melacanthus (Dallas) (Hemiptera: Pentatomidae), known as the green-belly stink bug, is part of the soybean stink bug complex in Brazil and has increasing importance in crops,with potential to reduce crop yield. This polyphagous stink bug has been registered in 29 plant species belonging to 10 plant families which include cultivated and non-cultivated plants. Plant resistance is a valuable tool in integrated pest management and may reduce insect populations below economic injury level. This study characterized the resistance of 17 soybean genotypes to the green-belly stink bug. All of the materials affected the biological performance of the green-belly stink bug, but PI 227687; ‘IAC 100’; PI 171451; IAC 78-2318; D 75-10169; IAC 74-2832; ‘IAC 23’ and ‘IAC 24’ caused mortality above 80% in the second instar. ‘IAC 17’; ‘IAC 18’; PI 171451; PI 274454; ‘Conquista’ and ‘IAC 19’ decreased the longevity of adults of D. melacanthus, showing the same mechanism of resistance. PI 227687 did not allow any insects to complete the immature stage. These results are unprecedented for the species D. melacanthus and can assist breeding programs that focus on resistance to members of the stink bug complex in soybean.

Highlights

Soybean [Glycine max (L.) Merrill] is the most cultivated crop in Brazil and one of the world’s main agricultural crops
To characterize the occurrence of antibiosis, this study evaluated several biological parameters of D. melacanthus, confined to green pods of 17 soybean genotypes belonging to different maturity groups
The genotypes PI 227687; ‘IAC 100’; PI 171451; IAC 78-2318; D 75-10169; ‘IAC 24’; IAC 74-2832 and ‘IAC 23’ caused mortality above 80% in the second instar, while L1-1-01 prevented only 43% of the insects, revealing this stage to be the most vulnerable of the insect (Figure 1). This result has already been reported in other studies involving soybean stink bug complex species (Piubelli et al 2003; Silva et al 2013b; Silva et al 2014)

Summary

Introduction

Soybean [Glycine max (L.) Merrill] is the most cultivated crop in Brazil and one of the world’s main agricultural crops. The species Dichelops melacanthus (Dallas) (Hemiptera: Pentatomidae), commonly known as the green-belly stink bug, is an important pest of several crops in southern Brazil, especially north of Paraná State (Smaniotto and Panizzi 2015). This stink bug is considered a key-pest for corn [Zea mays (L.)], wheat [Triticum aestivum (L.)], and other grasses such as oat [Avena strigosa (Schreb.)] and triticale [Triticum secale (Wittm.)] (Silva et al 2013a). Changes in the agricultural scenario, resulting from the no-tillage system and “off-season” maize cultivation, have contributed to the establishment of the greenbelly stink bug in agriculture (Chocorosqui and Panizzi 2004)

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